$-x+x^2-3x^2$
$83w+8d+29-28w+21d-5$
$937+726-894-657$
$\frac{dy}{dx}=\frac{3y^2+4x^2}{xy}$
$-\frac{\cos^2\left(x\right)}{\sin\left(x\right)}=2\sin\left(x\right)-\csc\left(x\right)$
$11>3-2x$
$1+\tan x+\sec x$
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